Tag: David T. Johnston
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Science & TechSigns of ‘snowball Earth’Researchers find strong clues that sea ice covered tropical climes, including the equator, 716.5 million years ago, suggesting there was a time of a “snowball Earth.”  
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Science & TechScientists find signs of ‘snowball Earth’Geologists have found evidence that sea ice extended to the equator 716.5 million years ago, bringing new precision to a “snowball Earth” event long suspected of occurring around that time. 
 
							 
							 
							